Rectified alternating-current converter



A ril 6, 1965 e. F- uomoouem 3,177,421

RRHPIBD Willa-0mm mm Filed I, 10. lm

Fig.2 I i 'mvsmm Georyefivnk/drlonW w. I Am United States Patent Ofifice 3,177,421 Patented Apr. 6, 1965 ortn the Unled sum theses-Anytime:

ISIedMaylO, 1961.58.80.109331 Sunfis- ((1321- This invention relates a rectifier-filter circuit for eonvertingsinglephmalternatingcurrenttodirectcnrmaybemanytimesgreaterthantheloadcurrent. Becauseoftheseet'femahalf-waverectifiercirwithasnot .beenavailablewhocanooth'mgandregulationeompnrc ina nwremfler' circnith applyingthereetifiedmtpnt iii Mmtcrval windings during alternate halt-cycles of the alternating voltage.

In the figures:

FIG. 1 is a half-wave rectifier circuit;

FIG. 2 is a first voltage-multiplying rectifier circuit;

FIG. 3 is a second voltapmultiplying circuit; and P FIG. 4 is a third voltage-multiplying rectifier circuit, each circuit in the figures employing the inventive concept in the present invention.

Referring to FIG. 1, it is seen that diode ll, inductor l2 and capacitor 13 form a conventional half-wave rectifiereircuitoonnectedacrusalternatingennentsouree l4. loadreaistorlsispositionedacrosstheoutpugand diode 16 is positioned across the input of the filter, which comprises inductor 12 and capacitor 13. The addition ofdiodc litntheknowndrcuitmodifiesthiscircuit amentally. In a conventional half-wave rectifier, the direct output voltage is the average of the alternating voltage applied tothefilter superimposedonaD.C.eomponent overthe intervaldm'ingwhichthediodeconducts. Theconduction interval is dependentupon the relationship between themagnimdeandphaseofthealternntingvoltagesap- 'gacrosstheoutpntofthesun-eeandtheinpmot thefilter,i.e.,thevolugesappearing acrosstheanode andmthcdeotthediode. Astheinductenceofthetiltergiven theaverane vottageofthetilterhasap'eater magnitudethanwhenaconventionalhalf-wavereetifler the 'tinFlG.listhntdirect Ifthevoltageofsoureeldissinnsoidalandofrootmean-squarcamplitudefianalysisoftheenergybalauce ofthecircuitshotsthatthevoltageappearing resistor 15 is IZII)E=0.45E, provided the resistances .otdiodellandinductorflareneglip'hleandtheinductaneeofinductorliissuficientlylarge.

3 twoequalwindingswduhataoexinthemag'mticpuhof incithcrwindingbutnot Zindiauthecuncatdiinductor c mpute; tain magnztic flux is the inductor by a given current in both. The arrows in FIG.

andofmotmcan-squmamplimdeEmalysisoftheencrgbdm ofthcdrmitshowsthatflaeloadvoltagais (4 El=-)E=1.8E pmvided the Waamnumm liarenegligibleandflnindndamgofflnindnctoris Referrmgto Gently RcfcxringtoFlG.4,v1nnth=loptumimlotfltcmat in; current gum: 40:: with respect to the 4 diodcsSAMinFlG. 3. Agaimiflhepolemialoisource 40 is sinusoidal and of root-mean-sqnare amplimde E, the vollagp appearing across 4 is (4 /f/ r)E=1.88,

manncrthal fluxesiablishedbyone ninfotmsthcfluxmblidnd the winding.

fil lmllmof havingafinnndsecoudoutpmwrmm' anind dndm'gawmdmg andatappoummcd" maid meamthefin:

afirstandsemndmcfifiamachlnv sewndtctminaLmeai-nforfln tedifia-toa tspecfivcendofaid windingmmforlhepoondwrmimlofsaid 70 and man Much 1960. m 1959.

momuwouumnmm. 

1. IN A RECTIFIER CIRCUIT, A SOURCE OF ALTERNATING VOLTAGE HAVING A FIRST AND SECOND OUTPUT TERMINAL, AN INDUCTOR HAVINGS A FIRST AND SECOND WINDING, A FIRST RECTIFIER CONNECTED BETWEEN THE FIRST TERMINAL OF SAID SOURCE AND ONE END OF SAID FIRST WINDING, A CAPACITOR CONNECTED BETWEEN THE OTHER END OF SAID FIRST WINDING AND THE SECOND TERMINAL OF SAID SOURCE, A SECOND RECTIFIER CONNECTED BETWEEN THE FIRST TERMINAL OF SAID SOURCE AND ONE END OF SAID SECOND WINDING, A CAPACITOR CONNECTED BETWEEN THE OTHER END OF SAID SECOND WINDING AND THE SECOND TERMINAL OF SAID SOURCE, SAID FIRST AND SECOND RECTIFIER BEING POSITIONED TO CONDUCT CURRENT DURING THE FIRST AND SECOND HALF-CYCLE RESPECTIVELY, OF SAID ALTERNATING VOLTAGE, AND SAID FIRST AND SECOND WINDING BEING WOUND AND POSITIONED IN SUCH A MANNER THAT THE MAGNETIC FLUX ESTABLISHED BY ONE WINDING REINFORCES THE MAGNETIC FLUX ESTABLISHED BY THE OTHER WINDING. 